I have received a reply from Audi in respect of rainwater collecting in the doors when parked on a slope, they suggest the following...
'I do understand your concerns with the possibility of corrosion, but please be assured that all our vehicles undergo rigorous testing and are provided with a comprehensive warranty. You may wish to consider purchasing a cover for your vehicle which you may find helpful. Please contact your local Audi Centre who will be more than happy to assist you and provide further reassurance. If you would like to confirm your address details, I will happily confirm the three nearest centres to your postcode. Alternatively, full details of all our centres can be found on our website: www.audi.co.uk/locateacentre.'
Do you think this would be a good investment? I was always told covers encourage damp and condensation and may cause further damage? Can one assume the drain holes in the doors are located incorrectly for cars parked on a slope?